physics  please help
posted by Nilan .
Assume the earth is a uniform sphere and that its path around the sun is curcular.
Calculate the kinetic energy that the earth has because of its rotation about its own axis. For comparison, the total energy used in the US in one year is about 9.33 x 10^9 J
b) Calculate the kinetic energy that the earth has because its motion around the sun.
thank you.

I forgot to mention that I got 6.417E29 for part A and 2.688E34 for part B. Both answers were wrong.
Please help. Thank you.